Streams in Alaska are turning orange with iron and sulfuric acid. Scientists are trying to figure out why. https://www.scientificamerican.com/article/why-are-alaskas-rivers-turning-orange/
Why Are Alaska's Rivers Turning Orange?

Streams in Alaska are turning orange with iron and sulfuric acid. Scientists are trying to figure out why

Scientific American
@JenLucPiquant I haven’t read the article yet, but I’ve got a hypothesis